Dual cab vehicles are variants of conventional goods vehicles with additional seating positions behind the driver and front passenger seats. They share a common chassis, to which the single or dual passenger cab and alternative tray sections may be fitted.

Dual cabs qualify for the work-related use exemption only if one of the following applies:

they are designed to carry a load of one tonne or more, or more than eight passengers

while having a designed load capacity of less than one tonne, they are not designed for the principal purpose of carrying passengers.

A dual cab that has a designed load-carrying capacity of less than one tonne may qualify for the work-related use exemption only if the vehicle is not designed for the principal purpose of carrying passengers. To determine whether the majority of the designed load capacity is attributable to passenger-carrying capacity, multiply the designed seating capacity (including the driver's seat) by 68 kilograms, which is the figure used for applying the Australian Design Rules. If the total passenger weight so determined exceeds the remaining 'load' capacity, the vehicle is treated as being designed for the principal purpose of carrying passengers and is ineligible for the work-related use exemption.

Example: Dual cab vehicles

A dual cab vehicle with a gross vehicle weight of 1,950 kilograms, a basic kerb weight of 1,400 kilograms and a designed seating capacity of five would be considered a vehicle designed principally for carrying passengers. This is because the majority of the total load capacity (340 kg (5 x 68 kg) of a total of 550 kg) would be absorbed by its designed passenger-carrying capacity.

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